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Hi,,
I want to invoke a method immediately after loading the Window, but I see that Constructor of the window class is called before load event. So how do i call my method once the window is loaded ? even I tried initialized method too.
thanks
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Either you do your thing in the constructor or after Window is loaded. You need to articulate what you want.
If winter comes is spring far behind? - (PBShelley -Ode to the West Wind)
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Not everything is "ready for use" at one point. Some stuff is ready by the time you get to the constructor, some stuff not til the WindowLoaded event, other stuff is not ready til OnApplyTemplate, etc. You have to be more specific.
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I would like to display a picture in my WPF application, where the picture is loaded from a resource file. I have no idéa how to pull this off. Please help me.
This is what I have done:
1) Created a new WPF application called: WpfApplication1
2) Created a resource file called: Pictures.resx
3) Added the picture into the resource file
4) The picture is called: CELabel, in the resoruce file explorer window
5) Automatically a folder in in my application is created, called Resources, containing the picture: CELabel.png
Now I would like to code the appropriate XAML code to display the picture. So I tried this:
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<Image Source="/Pictures/CELabel.png"></Image>
</Grid>
</Window>
And of course the damn compiler results in an error:
Could not find a part of the path 'C:\Pictures\CELabel.png'
Yes, of course the resource file is not recognizable in the XMAL editor and then my picture cannot be loaded.
How do I pull this off? I'm sure this is rediculious easy when knowing how...
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If you change
<Image Source="/Pictures/CELabel.png"></Image> to
<Image Source="Pictures/CELabel.png"></Image> it should work.
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Well there is no more compiler error, that always something. But no result, my application is blank. But I got this warning:
The file 'Pictures/CELabel.png' is not part of the project or its 'Build Action' property is not set to 'Resource'.
I changed the pictures 'Build Action' property to 'Resource' and re-built the entire project but with no result, still same warning.
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How about trying it this way:
<Image HorizontalAlignment="Center" Grid.Row="2" Grid.Column="1" Height="40" Width="40"
Source="/WpfApplication1;component/Pictures/CELabel.png"></Image>
Still if it doesn't work, then put it in the code-behind(not a good way though!)
myImage.Source=new BitmapImage(new Uri("WpfApplication1;component/Pictures/CELabel.png",UriKind.Relative));
This should work.
People with high attitude deserve the standing ovation of our highest finger!
My Technical Blog![ ^]
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In one of the pages of the silverlight 4 application, I access the windows service to check for some data...
All works fine so far.
If the windows service has been stopped, I get an error when the code tries to access it.
I am using try catch but it seems the code gives error and does not go to the catch block if the windows service is stopped.
Question:
How can I check if the windows service is stopped so that then I do not have to call the method inside the windows service? I think this way, I will not get any errors?
Thanks
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I checked the website but it does not solve my issue because there is no servicecontroller in silverlight as far as I see.
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Please post code including try catch statements and the exception being thrown, might be able to help then.
"You get that on the big jobs."
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In silverlight app when it is running, if the windows service has stopped, then on the bottom right hand side of the website, it shows as Error. When I click on it, it shows that the error has occured when calling the service with the method name.
I basically would like to get a message in say a label control to say something like : Possible error is due to the service being stopped.
Thanks
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In your App class, you will probably already have code that catches UnhandledExceptions. You need to hook into this code.
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In below code, The Getsettings() is called.
And definitely the client_GetSettingsCompleted is NOT called because the windows service is stopped.
The code passes the client.GetSettingsAsync(); but then the error seems to occur in EndGetSetting in the reference.cs file.
Any thoughts please?
Thanks
private void GetSettings()
{
MyWinService.myClassClient client = new MyWinService.myClassClient();
client.GetSettingsCompleted += new EventHandler<MyWinService.GetSettingsCompletedEventArgs>(client_GetSettingsCompleted);
client.GetSettingsAsync();
}
void client_GetSettingsCompleted(object sender, MyWinService.GetSettingsCompletedEventArgs e)
{
...
}
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I must admit, I'm a bit confused. Are you running this code Out Of Browser? Are you trying to determine if the service is running on the client side, or on the server side?
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Hi,
I start the windows service.
When it is running, I then browse to the silverlight page. And that is when it gives error.
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You still haven't answered the basic question. Client side or server side?
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The error is on the silverlight side, so I guess the answer to your question is client.
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Are you sure? Unless the SL app is given elevated permissions, and running OOB you cannot interact with things like services on the client side. Remember, if you are testing the application on the same machine you are running the web server on, you will see different behaviour than if you run the app on a separate server.
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If I run the SL app as well as the win service on my machine, the error happens as explained before. i.e. when there is a call to the service.
If run on the server, the error is shown on the bottom left hand side with the yellow exclamation sign.
My question is how to see if the service is running or not so that I can code around the method which calls the service. i.e. if service is stopped then no nned to call the method inside it...
Hope I have answered your question.
Thank you
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The only thing I could think of is to use WMI to query for the service status. You can use WMI with SL as detailed here[^].
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I will try that.
Many thanks
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Without knowing more about the MyWinService object, it is impossible to answer the question to avoid throwing an exception. You could however catch the exception that is thrown and handle it in the GetSettings method.
private void GetSettings()
{
try
{
MyWinService.myClassClient client = new MyWinService.myClassClient();
client.GetSettingsCompleted += new EventHandler<MyWinService.GetSettingsCompletedEventArgs>(client_GetSettingsCompleted);
client.GetSettingsAsync();
}
catch (TheActualExceptionException e)
{
}
}
You may want to start with catching Exception and refine your catch statement once you know the type of exception is being throw.
"You get that on the big jobs."
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Does the exception come back to the callback or the instigator of the call? I was pretty sure it is the callback!
Never underestimate the power of human stupidity
RAH
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It should come back to the callback. In this example, once the async call has been issued, the code would fall out of the call method.
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